2016
Mathematics
JAMB
Solve for x and y respectively 3x - 5y = 9 6x - 4y = 12
A.
3/4 , 1
B.
4/3 , 1
C.
3/4 , -1
D.
4/3 , -1
Correct Answer: 4/3 , -1
Explanation
3x - 5y = 9 ------x2 6x - 4y = 12 -----x1 6x - 10y = 18 -6x - 4y = 12 ____________ 6y/−6 = 6/6 y = -1 in eq (1) 3x - 5y = 9 3x - 5(-1) = 9 3x + 5 = 9 3x = 4 x = 4/3
3x - 5y = 9 ------x2 6x - 4y = 12 -----x1 6x - 10y = 18 -6x - 4y = 12 ____________ 6y/−6 = 6/6 y = -1 in eq (1) 3x - 5y = 9 3x - 5(-1) = 9 3x + 5 = 9 3x = 4 x = 4/3THIS WEEK's
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